From The Collaborative International Dictionary of English v.0.48:
Vent \Vent\, v. t. [imp. & p. p. Vented; p. pr. & vb. n.
Venting.]
1. To let out at a vent, or small aperture; to give passage
or outlet to.
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2. To suffer to escape from confinement; to let out; to
utter; to pour forth; as, to vent passion or complaint.
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The queen of heaven did thus her fury vent.
--Dryden.
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3. To utter; to report; to publish. [Obs.]
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By mixing somewhat true to vent more lies. --Milton.
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Thou hast framed and vented very curious orations.
--Barrow.
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4. To scent, as a hound. [Obs.] --Turbervile.
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5. To furnish with a vent; to make a vent in; as, to vent. a
mold.
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